Floating photovoltaic panel installation structure and buoyancy body for installation of floating photovoltaic panel

ABSTRACT

Disclosed are a floating photovoltaic panel installation structure and a buoyancy body for the installation of the floating photovoltaic panel, which may have excellent strength and buoyancy performance even while having light-weight characteristics, and stably support a photovoltaic panel on the water even during the flowing of a water surface due to waves. In the floating photovoltaic panel installation structure according to an embodiment of the present disclosure, as the floating photovoltaic panel installation structure including at least one unit floating type structure for supporting a photovoltaic panel on the water, the unit floating type structure includes a plurality of buoyancy bodies arranged to be spaced apart from each other, a photovoltaic panel support structure supported on the plurality of buoyancy bodies, a triangular bracket coupled with a plurality of photovoltaic panel support structures, and a ball joint hinge apparatus for connecting the plurality of photovoltaic panel support structures. At least one buoyancy body among the plurality of buoyancy bodies is made of a material in which Polyethylene and Waste Carbon Fiber Reinforced Plastics have been blended. For maintaining stable position and posture, the buoyancy body may include a cylindrical body having both side surfaces protruded convexly, and both side surfaces of the cylindrical body may be designed to have a shape in which a curvature radius of an upper area is smaller than a curvature radius of a lower area including a portion positioned below the water surface. In order to stably support the photovoltaic panel against the movement of waves, adjacent unit floating type structures may be connected in a joint structure by the ball joint hinge apparatus of a plastic material connected to the end portion of square tubes of the photovoltaic panel support structure.

CROSS-REFERENCE TO RELATED APPLICATION

This application claims priority to Korean Patent Application No.10-2019-0094437, filed on Aug. 2, 2018, which is incorporated herein byreference in their entirety.

BACKGROUND OF THE DISCLOSURE Field of the Disclosure

The present disclosure relates to a floating photovoltaic panelinstallation structure and a buoyancy body for the installation of thefloating photovoltaic panel, and more particularly, to a floatingphotovoltaic panel installation structure and a buoyancy body for theinstallation of the floating photovoltaic panel, which may haveexcellent strength and buoyancy performance even while havinglight-weight characteristics, and stably support a photovoltaic panel onthe water even during the flowing of a water surface due to waves.

Description of Related Art

Recently, as the regulations on environmental pollution and greenhousegases are strengthened globally, studies on a renewable energy systemsuch as a photovoltaic system capable of replacing the use of a fossilfuel such as coal are being actively conducted. The photovoltaic systemis a power generation system for generating electricity by using solarheat, and may be classified into a ground photovoltaic system and afloating photovoltaic system according to the installation environment.The floating photovoltaic system floatingly installs a photovoltaicpanel on the water such as a seawall, an ocean, a stream, a river, adam, a reservoir, or a freshwater lake, and is in the spotlight becauseit may overcome the space restraints on the ground and install aphotovoltaic facility in a large space without damaging a farmland or aforest. Further, the floating photovoltaic system also has theadvantages that may enhance the power generation efficiency by thecooling effect on the water surface, prevent the green algae and the redalgae by reducing the direct sunlight falling on the water surface,increase the population of fish that live under the floatingphotovoltaic system, and the like.

Although the floating photovoltaic system requires the strengthperformance and the buoyancy performance of the degree that may stablysupport the photovoltaic panel on the water surface, there is a problemin that the weight and cost of the buoyancy body that provides buoyancyto the photovoltaic panel and the support structure increase, and it isdifficult to maximize the photovoltaic efficiency in order to enhancethe strength/the buoyancy performance. Further, since the floatingphotovoltaic system is floatingly installed on the water, the flowing ofthe floating photovoltaic system may occur vertically and horizontallydue to the fluctuation of the water surface due to waves, or the like,and the collision between the adjacent photovoltaic panels or thecollision between adjacent support structures for supporting thephotovoltaic panel may occur due to the flowing, thereby increasing themaintenance cost.

SUMMARY OF THE DISCLOSURE

An object of the present disclosure is to provide a floatingphotovoltaic panel installation structure and a buoyancy body for theinstallation of the floating photovoltaic panel, which may haveexcellent strength and buoyancy performance even while havinglight-weight characteristics, and stably support a photovoltaic panel onthe water even during the flowing of a water surface due to waves.

In a floating photovoltaic panel installation structure according to oneaspect of the present disclosure, as the floating photovoltaic panelinstallation structure including at least one unit floating typestructure for supporting a photovoltaic panel on the water, the unitfloating type structure includes a plurality of buoyancy bodies arrangedto be spaced apart from each other, a photovoltaic panel supportstructure supported on the plurality of buoyancy bodies, and at leastone photovoltaic panel supported by the photovoltaic panel supportstructure, and at least one buoyancy body among the plurality ofbuoyancy bodies is made of a material in which Polyethylene and WasteCarbon Fiber Reinforced Plastics have been blended.

Further, the Waste Carbon Fiber Reinforced Plastics may include a wastegenerated in a process of manufacturing Carbon Fiber ReinforcedPlastics.

Further, the at least one buoyancy body may contain 20 to 80 wt % of thePolyethylene, 20 to 80 wt % of the Waste Carbon Fiber ReinforcedPlastics, and 3 wt % or more of an ultraviolet shielding agent.

Further, the at least one buoyancy body may contain a High DensityPolyethylene having the density of 930 to 970 kg/m³, a Low DensityPolyethylene having the density of 915 to 925 kg/m³, a Linear LowDensity Polyethylene, and the Waste Carbon Fiber Reinforced Plastics,and provide buoyancy of 10 times or more relative to the weight of thebuoyancy body.

Further, the at least one buoyancy body may include a cylindrical bodyhaving an upper structure and a lower structure fused and coupled toeach other thereon and extending along a first direction, the upperstructure may include an upper body having a semi-cylindrical shape withthe upper portion cut, and having the internal space partitioned intoupper compartments having a lattice structure by upper lattices, and acoupling plate formed integrally above the upper body, and for couplingwith the photovoltaic panel support structure, the lower structure mayinclude a lower body having a semi-cylindrical shape with the lowersurface curved and having the internal space partitioned into lowercompartments to have the lattice structure by lower lattices, and thecylindrical body may be formed with a plurality of air pockets havingthe lattice structure in the internal space by the upper compartmentsand the lower compartments.

Further, the photovoltaic panel support structure may include squaretubes made of a corrosion-resistant metal material disposed on theplurality of buoyancy bodies, the coupling plate of the buoyancy bodymay be extended to be protruded from both side edges of the uppersurface of the upper body toward the outside, the upper surface of thecoupling plate may be formed to have a flat surface, and coupling holesfor coupling at least one square tube among the square tubes may bepenetrated and formed on the edge portion of the coupling plateexpanding from the upper body to the outside.

Further, the photovoltaic panel support structure may include atriangular bracket for having a spacing distance (d) in order to preventthe photovoltaic panel from being flooded due to waves or roller of thewater surface, and the triangular bracket may be made of a material inwhich the Polyethylene and the Waste Carbon Fiber Reinforced Plasticshave been blended.

Further, the at least one square tube among the square tubes may be madeof a material in which the Polyethylene and the Waste Carbon FiberReinforced Plastics have been blended.

Further, the floating photovoltaic panel installation structure mayinclude the unit floating type structure in plural, and in order tostably support the photovoltaic panel against the movement of waves,adjacent unit floating type structures include a hinge apparatus of ajoint structure by the ball joint hinge apparatus of a plastic materialconnected to the end portions of the square tubes.

Further, both side surfaces of the cylindrical body with respect to thefirst direction may have a convex shape protruded from the cylindricalbody to the outside, the both side surfaces of the cylindrical body mayhave a curvature radius changed with the height, a lower area includinga portion positioned below the water surface of the both side surfacesof the cylindrical body may have a first arc shape having a firstcurvature radius, and an upper area higher than the lower area of theboth side surfaces may have a second arc shape having a second curvatureradius smaller than the first curvature radius.

Further, both side surfaces of the cylindrical body with respect to thefirst direction may have a convex shape protruded from the cylindricalbody to the outside, the both side surfaces of the cylindrical body mayhave a curvature radius changed with the height, the both side surfacesof the cylindrical body may have a first lower area, a second lowerarea, a first upper area, and a second upper area in order disposedthereon from the lowermost end of the cylindrical body to the uppermostend thereof, the curvature radiuses of the first lower area and thesecond upper area may be formed to be smaller than the curvatureradiuses of the second lower area and the first upper area, thecurvature radius of the first lower area and the curvature radius of thesecond upper area may be the same as each other, and the curvatureradius of the second lower area and the curvature radius of the firstupper area may be the same as each other.

Further, the air pocket of the cylindrical body may include a first airpocket, a second air pocket, and a third air pocket formed to havedifferent volumes from each other, an air pocket having the largestvolume and air pockets having the next largest volume among the firstair pocket, the second air pocket, and the third air pocket may bedisposed on both side surfaces of the cylindrical body with respect tothe first direction, and air pockets having the smallest volume aredisposed at the middle side of the cylindrical body.

A buoyancy body for the installation of a floating photovoltaic panelaccording to another aspect of the present disclosure, as the buoyancybody for the installation of the floating photovoltaic panel forsupporting a photovoltaic panel on the water, may include a cylindricalbody having the cross section perpendicular to a first direction havinga circular shape with the upper portion cut, extending along the firstdirection, and providing buoyancy for supporting the photovoltaic panel,and the cylindrical body may be made of a material in which Polyethyleneand Waste Carbon Fiber Reinforced Plastics have been blended.

Further, the cylindrical body may include a High Density Polyethylenehaving the density of 930 to 970 kg/m³, a Low Density Polyethylenehaving the density of 915 to 925 kg/m³, a Linear Low DensityPolyethylene, and the Waste Carbon Fiber Reinforced Plastics, the WasteCarbon Fiber Reinforced Plastics may include a waste generated in aprocess of manufacturing Carbon Fiber Reinforced Plastics, and thecylindrical body may be configured to contain 20 to 80 wt % of thePolyethylene, to 80 wt % of the Waste Carbon Fiber Reinforced Plastics,and 3 wt % or more of an ultraviolet shielding agent, and to providebuoyancy of 10 times or more relative to the weight of the cylindricalbody.

Further, the cylindrical body may have a structure having an upperstructure and a lower structure fused and coupled to each other thereon,the upper structure may include an upper body having a semi-cylindricalshape with the upper portion cut, and having the internal spacepartitioned into upper compartments having a lattice structure by upperlattices, and a coupling plate formed integrally above the upper body,and for coupling with the photovoltaic panel support structure forsupporting the photovoltaic panel, and the lower structure may include alower body having a semi-cylindrical shape with the lower surface curvedand having the internal space partitioned into lower compartments tohave the lattice structure by lower lattices, and the cylindrical bodymay be formed with a plurality of air pockets having the latticestructure in the internal space by the upper compartments and the lowercompartments.

Further, both side surfaces of the cylindrical body with respect to thefirst direction may have a convex shape protruded from the cylindricalbody to the outside, the both side surfaces of the cylindrical body mayhave a curvature radius changed with the height, a lower area includinga portion positioned below the water surface of the both side surfacesof the cylindrical body has a first arc shape having a first curvatureradius, and an upper area higher than the lower area of the both sidesurfaces may have a second arc shape having a second curvature radiussmaller than the first curvature radius.

Further, both side surfaces of the cylindrical body with respect to thefirst direction may have a convex shape protruded from the cylindricalbody to the outside, the both side surfaces of the cylindrical body mayhave a curvature radius changed with the height, the both side surfacesof the cylindrical body may have a first lower area, a second lowerarea, a first upper area, and a second upper area in order disposedthereon from the lowermost end of the cylindrical body to the uppermostend thereof, the curvature radiuses of the first lower area and thesecond upper area may be formed to be smaller than the curvatureradiuses of the second lower area and the first upper area, thecurvature radius of the first lower area and the curvature radius of thesecond upper area may be the same as each other, and the curvatureradius of the second lower area and the curvature radius of the firstupper area may be the same as each other.

Further, the air pocket of the cylindrical body may include a first airpocket, a second air pocket, and a third air pocket formed to havedifferent volumes from each other, an air pocket having the largestvolume and air pockets having the next largest volume among the firstair pocket, the second air pocket, and the third air pocket may bedisposed on both side surfaces of the cylindrical body with respect tothe first direction, and air pockets having the smallest volume may bedisposed at the middle side of the cylindrical body.

According to an embodiment of the present disclosure, it is possible toprovide the floating photovoltaic panel installation structure and thebuoyancy body for the installation of the floating photovoltaic panel,which may have excellent strength and buoyancy performance even whilehaving light-weight characteristics, and stably support the photovoltaicpanel on the water even during the flowing of the water surface due towaves.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a plane diagram of a floating photovoltaic panel installationstructure according to an embodiment of the present disclosure.

FIG. 2 is a perspective diagram of a unit floating type structureconstituting the floating photovoltaic panel installation structureaccording to an embodiment of the present disclosure.

FIG. 3 is a perspective diagram illustrating a plurality of buoyancybodies and photovoltaic panel support structure constituting thefloating photovoltaic panel installation structure according to anembodiment of the present disclosure.

FIG. 4 is a perspective diagram illustrating a portion of the floatingphotovoltaic panel installation structure according to an embodiment ofthe present disclosure.

FIG. 5 is a perspective diagram of a buoyancy body constituting thefloating photovoltaic panel installation structure according to anembodiment of the present disclosure.

FIG. 6 is an exploded perspective diagram of a buoyancy bodyconstituting the floating photovoltaic panel installation structureaccording to an embodiment of the present disclosure.

FIG. 7 is a perspective diagram of an upper structure constituting abuoyancy body for the installation of the floating photovoltaic panelaccording to an embodiment of the present disclosure.

FIG. 8 is a side diagram of the buoyancy body for the installation ofthe floating photovoltaic panel according to an embodiment of thepresent disclosure.

FIG. 9 is a front diagram of the buoyancy body for the installation ofthe floating photovoltaic panel according to an embodiment of thepresent disclosure.

FIG. 10 is a perspective diagram of a ball joint hinge apparatusconstituting the floating photovoltaic panel installation structureaccording to an embodiment of the present disclosure.

FIG. 11 is a partial perspective diagram of the ball joint hingeapparatus constituting the floating photovoltaic panel installationstructure according to an embodiment of the present disclosure.

FIG. 12 is a perspective diagram for explaining the connection betweenthe ball joint hinge apparatus and a square tube constituting thefloating photovoltaic panel installation structure according to anembodiment of the present disclosure.

FIGS. 13 and 14 are side diagrams for explaining an operation of theball joint hinge apparatus constituting the floating photovoltaic panelinstallation structure according to an embodiment of the presentdisclosure.

FIG. 15 is a side diagram for explaining an operation of the ball jointhinge apparatus constituting the floating photovoltaic panelinstallation structure according to an embodiment of the presentdisclosure.

FIG. 16 is a perspective diagram of a buoyancy body for the installationof a floating photovoltaic panel according to another embodiment of thepresent disclosure.

FIG. 17 is a side diagram of the buoyancy body for the installation ofthe floating photovoltaic panel in FIG. 16.

FIG. 18 is a front diagram of the buoyancy body for the installation ofthe floating photovoltaic panel in FIG. 16.

FIGS. 19 and 20 are exploded perspective diagrams of the buoyancy bodyfor the installation of the floating photovoltaic panel in FIG. 16.

FIGS. 21 and 22 are diagrams illustrating the function of a triangularbracket in a floating photovoltaic panel installation structureaccording to still another embodiment of the present disclosure.

DESCRIPTION OF SPECIFIC EMBODIMENTS

Hereinafter, embodiments of the present disclosure will be described indetail with reference to the accompanying drawings so that those skilledin the art to which the present disclosure pertains may easily practiceit. The present disclosure may be implemented in various different formsand is not limited to the embodiments described herein. Further, sincethe size and thickness of each component illustrated in the drawing arearbitrarily illustrated for convenience of description, the presentdisclosure is not necessarily limited to the illustrated one.

In the present specification, when a part is said to “include” acomponent, it means that it may further include other components,without excluding the other components unless otherwise stated. In thedrawings, parts irrelevant to the description have been omitted in orderto clearly describe the present disclosure and the same or likecomponents have been denoted by the same reference numerals throughoutthe specification.

FIG. 1 is a plane diagram of a floating photovoltaic panel installationstructure according to an embodiment of the present disclosure.Referring to FIG. 1, a floating photovoltaic panel installationstructure 10 according to an embodiment of the present disclosure may beprovided to floatingly install a plurality of photovoltaic panels 160 onthe water such as the water surface of Saemangeum, or the like, anocean, a stream, a river, a dam, a reservoir, or a freshwater lake. Thefloating photovoltaic panel installation structure 10 may include aplurality of unit floating type structures 100, 100′ floatinglyinstalled on the water. Each of the unit floating type structures 100,100′ is provided to support at least one photovoltaic panel 160 on thewater.

Although each of the unit floating type structures 100, 100′ isconfigured to support two photovoltaic panels 160 in an embodiment ofFIG. 1, each of the unit floating type structures 100, 100′ may also beconfigured to support one photovoltaic panel 160 or three or morephotovoltaic panels 160. The plurality of unit floating type structures100, 100′ may be arranged in a plurality of rows and columns. Althoughit has been illustrated in FIG. 1 that two unit floating type structures100, 100′ have been connected to each other, it is natural that thefloating photovoltaic panel installation structure 10 may be configuredso that three or more unit floating type structures 100, 100′ areconnected to each other.

The plurality of unit floating type structures 100, 100′ may beconnected to each other by a plurality of ball joint hinge apparatuses180. An angle between the unit floating type structures 100, 100′ may besmoothly adjusted therebetween through the ball joint hinge apparatus180 when a flow occurs on the water surface due to waves or the like,and accordingly, it is possible to maintain a stable support state ofthe photovoltaic panel 160. The ball joint hinge apparatus 180 will bedescribed in more detail later with reference to FIGS. 10 to 15. At thistime, the ball joint hinge apparatus 180 may be referred to as a balljoint link.

FIG. 2 is a perspective diagram of a unit floating type structureconstituting the floating photovoltaic panel installation structureaccording to an embodiment of the present disclosure. Referring to FIGS.1 and 2, the unit floating type structure 100 may include a plurality ofbuoyancy bodies 120 for providing buoyancy, a triangular bracket 170 forspacing the photovoltaic panel support structure 140 supported on theplurality of buoyancy bodies 120 and floating on the water surface apartfrom and the photovoltaic panel by a distance (d) on the water surface,the ball joint hinge apparatus 180 for connecting the photovoltaic panelsupport structure, and at least one photovoltaic panel 160 supported bythe photovoltaic panel support structure 140.

FIG. 3 is a perspective diagram illustrating a plurality of buoyancybodies and photovoltaic panel support structure constituting thefloating photovoltaic panel installation structure according to anembodiment of the present disclosure. Referring to FIGS. 1 to 3, theplurality of buoyancy bodies 120 may be arranged to be spaced apart fromeach other below the photovoltaic panel support structure 140. Theplurality of buoyancy bodies 120 may be arranged in the appropriatenumber and interval to provide the buoyancy sufficient for floating thephotovoltaic panel support structure 140 and the photovoltaic panel 160,and is preferably prepared in four or more every unit floating typestructure 100. Although each unit floating type structure 100 includessix buoyancy bodies 120 in a 3×2 arrangement structure in theillustrated embodiment, the number of buoyancy bodies 120 of the unitfloating type structure 100 may be changed variously.

At least one buoyancy body 120 of the plurality of buoyancy bodies 120may be made of a material in which Polyethylene and Waste Carbon FiberReinforced Plastics (WCFRP) of high-tech composites are blended. TheWaste Carbon Fiber Reinforced Plastics may include a waste (for example,low-grade Carbon Fiber Reinforced Plastics that do not meet apredetermined reference) generated in a process of manufacturing theCarbon Fiber Reinforced Plastics, which is a composite polymer materialof carbon fiber and plastic or the Carbon Fiber Reinforced Plasticswasted by the reason such as the shortened length of the carbon fiber.The buoyancy body 120 in which the Polyethylene and the Waste CarbonFiber Reinforced Plastics have been blended may be inexpensive, may havesufficient strength and rigidity capable of supporting the photovoltaicpanel support structure 140 and the photovoltaic panel 160 even whilelight-weighting the buoyancy body 120, and at the same time, providebuoyancy sufficient for floating the photovoltaic panel supportstructure 140 and the photovoltaic panel 160 on the water.

In an embodiment, the buoyancy body 120 may contain 3 wt % or more of anultraviolet shielding agent, and contain more than 0 and 97 wt % or lessof the Polyethylene and the Waste Carbon Fiber Reinforced Plastics. Inorder to secure the light-weight, the strength/rigidity, and thebuoyancy performance, the buoyancy body 120 may be made of a materialcontaining a High Density Polyethylene having the density of 930 to 970kg/m³, a Low Density Polyethylene having the density of 915 to 925kg/m³, a Linear Low Density Polyethylene, and the Waste Carbon FiberReinforced Plastics.

According to an embodiment of the present disclosure, it is possible tosecure the rigidity for supporting the photovoltaic panel supportstructure 140 and the photovoltaic panel 160 while minimizing the weightof the buoyancy body 120. Further, it is possible to provide thebuoyancy of about 10 times or more relative to the weight of thebuoyancy body 120 by the buoyancy body 120. In an embodiment, thebuoyancy body 120 may be designed to have the weight of about 10 to 30kg (for example, about 20 kg), and to provide the buoyancy of about 200to 300 kg (for example, about 260 kg) or more.

The photovoltaic panel support structure 140 may be disposed above theplurality of buoyancy bodies 120. The photovoltaic panel supportstructure 140 may include square tubes 142, 144 made of acorrosion-resistant metal material disposed on the plurality of buoyancybodies 120, a photovoltaic panel supporter 146 and a triangular bracket170 supported on the square tubes 142, 144 to support the photovoltaicpanel 160, and the ball joint hinge apparatus 180. The square tubes 142,144 may include the first square tubes 142 coupled on the plurality ofbuoyancy bodies 120 in a second direction (Y) perpendicular to a firstdirection (X), and the second square tubes 144 coupled on the firstsquare tubes 142 in the first direction (X). Bolting fastening, weldingfastening, or the like may be used as a fixing method of the firstsquare tubes 142 and the second square tubes 144, but the presentdisclosure is not limited to this fastening method.

In an embodiment, the first square tubes 142 may be arranged in thesecond direction (Y) on the buoyancy bodies 120 arranged along thesecond direction (Y) to be coupled on the buoyancy bodies 120. Thesecond square tubes 144 may be arranged in the first direction (X) onthe buoyancy bodies 120 arranged along the first direction (X) to becoupled on the first square tubes 142. Although two first square tubes142 and two second square tubes 144 are coupled to each of the buoyancybodies 120 in the illustrated embodiment, the number of the square tubes142, 144 coupled on the buoyancy body 120 is not limited thereto.

In an embodiment, some of the square tubes 142, 144 may be provided as asquare tube formed of a high corrosion-resistant plating steel plate(for example, PosMAC), and others of the square tubes 142, 144 may bemade of a material in which the Polyethylene and the Waste Carbon FiberReinforced Plastics have been blended. In order to secure thestrength/rigidity for supporting the photovoltaic panel and thelight-weight, a ratio of blending the Polyethylene and the Waste CarbonFiber Reinforced Plastics may be designed in the range of 20:80 to80:20. It is possible to use heterogeneous square tubes 142, 144 incombination, thereby light-weighting the photovoltaic panel supportstructure 140 while supporting the photovoltaic panel 160 withsufficient strength and rigidity, and saving the manufacturing cost.

In an embodiment, some of the two or more first square tubes 142 coupledon one buoyancy body 120 may be provided as PosMAC square tubes, andothers of the first square tubes 142 may be made of a material in whichthe Polyethylene and the Waste Carbon Fiber Reinforced Plastics havebeen blended. Further, some of the two or more second square tubes 144coupled on one buoyancy body 120 may be provided as PosMAC square tubes,and others of the second square tubes 144 may be made of a material inwhich the Polyethylene and the Waste Carbon Fiber Reinforced Plasticshave been blended.

In an embodiment, a maintenance scaffold 190 may be fixed between thephotovoltaic panels 160 on the second square tubes 144. The maintenancescaffold 190 may provide the moving route for an operator to perform themaintenance work of the floating photovoltaic panel installationstructure. The maintenance scaffold 190 may be installed in parallelwith the photovoltaic panel 160, and arranged in the first direction (X)or the second direction (Y). The maintenance scaffold 190 may be made ofa material in which the Polyethylene and the Waste Carbon FiberReinforced Plastics have been blended. In an embodiment, in order tosecure the strength/rigidity performance and the light-weight, a ratioof blending the Polyethylene and the Waste Carbon Fiber ReinforcedPlastics constituting the maintenance scaffold 190 may be designed inthe range of 20:80 to 80:20. The maintenance scaffold 190 may beprovided as a perforated plate having a plurality of holes perforatedfor the light-weight. Although the maintenance scaffold 190 is installedon the second square tubes 144 in the illustrated embodiment, themaintenance scaffold 190 may also be installed on the first square tubes142.

FIG. 4 is a perspective diagram illustrating a portion of the floatingphotovoltaic panel installation structure according to an embodiment ofthe present disclosure. Referring to FIG. 4, the photovoltaic panelsupporter 146 may be provided to have sufficient strength and rigidityto support the weight of the photovoltaic panel 160. The photovoltaicpanel supporter 146 may be designed in a C-shaped steel, an H-shapedsteel, a square tube, or the like. The photovoltaic panel supporter 146may be made of a material in which the Polyethylene and the Waste CarbonFiber Reinforced Plastics have been blended at a ratio of 20:80 to80:20. In an embodiment, the photovoltaic panel supporter 146 mayinclude a lower supporter 146 a, an upper supporter 146 b, verticalsupporters 146 c, inclined supporters 146 d, and the triangular bracket170.

The lower supporter 146 a may be coupled on the second square tubes 144in the second direction (Y). The vertical supporters 146 c may bevertically coupled on the second square tubes 144 at a position spacedapart from the lower supporter 146 a in the first direction (X). Theupper supporter 146 b may be coupled on the upper ends of the verticalsupporters 146 c in the second direction (Y). The inclined supporters146 d may have one end coupled to the lower supporter 146 a and have theother end coupled to the upper supporter 146 b.

The photovoltaic panel 160 is coupled on the triangular bracket 170, thelower supporter 146 a, the upper supporter 146 b, and the inclinedsupporters 146 d to be supported in the inclined direction mainly facingthe sun by the photovoltaic panel supporter 146. The photovoltaic panel160 may be installed in a structure in which a plurality of photovoltaiccells have been arranged in the first direction (X) and the seconddirection (Y). Although two photovoltaic panel supporters 146 areinstalled on the unit floating type structure 100 along the firstdirection (X) in the illustrated embodiment, the number and arrangementstructure of the photovoltaic panel supporters 146 may be changedvariously according to the number of installation, size, and the like ofthe photovoltaic panel 160.

FIG. 5 is a perspective diagram of the buoyancy body constituting thefloating photovoltaic panel installation structure according to anembodiment of the present disclosure. FIG. 6 is an exploded perspectivediagram of the buoyancy body constituting the floating photovoltaicpanel installation structure according to an embodiment of the presentdisclosure. FIG. is a perspective diagram of an upper structureconstituting the buoyancy body for the installation of the floatingphotovoltaic panel according to an embodiment of the present disclosure.FIG. 8 is a side diagram of the buoyancy body for the installation ofthe floating photovoltaic panel according to an embodiment of thepresent disclosure. FIG. 9 is a front diagram of the buoyancy body forthe installation of the floating photovoltaic panel according to anembodiment of the present disclosure.

Referring to FIGS. 5 to 9, the buoyancy body 120 may include acylindrical body 200 extending along the first direction (X). Thecylindrical body 200 may provide buoyancy for supporting thephotovoltaic panel support structure 140 and the photovoltaic panel 160.The cross-sectional shape of the cylindrical body 200 in the directionperpendicular to the first direction (X) may be provided in a circularshape with the upper portion cut. In an embodiment, the cross-sectionalshape of the cylindrical body 200 may be provided in a shape with theupper portion cut by about fifth of the diameter of the circular crosssection.

In an embodiment, the cylindrical body 200 may be manufactured by fusingand coupling the upper structure 220 and the lower structure 240 to eachother. In an embodiment, for the smooth fusion coupling between theupper structure 220 and the lower structure 240, the upper structure 220and the lower structure 240 may contain about 20 to 80 wt % of thePolyethylene, and contain about 20 to 80 wt % of the Waste Carbon FiberReinforced Plastics to secure the light-weight and thestrength/rigidity.

The upper structure 220 may include an upper body 222 having asemi-circular cross-sectional shape with the upper portion cut, and acoupling plate 228 of a square plate shape formed integrally above theupper body 222 so that the photovoltaic panel support structure 140 maybe stably fixed. The upper body 222 may have the internal spacepartitioned into upper compartments 226 by upper lattices 224. The upperlattices 224 may be formed in plural in the first direction (X) and thesecond direction (Y).

In order for the first square tubes 142 to be coupled on the couplingplate 228 firmly and easily, the upper surface of the coupling plate 228may be provided as a flat surface. In an embodiment, the coupling plate228 may extend outwards along the second direction (Y) from both sideedges of the upper surface of the upper body 222 by a protrusiondistance (A), and the coupling holes 228 a for coupling with the firstsquare tubes 142 may be penetrated and formed in a third direction (Z),which is a vertical direction thereof, around two edges of the couplingplate 228 extending outwards from the upper body 222. The first squaretubes 142 may be coupled to the coupling plate 228 by a fastening meanssuch as a bolt fastened to the coupling holes 228 a.

The lower structure 240 may include a lower body 242 having asemi-circular cross-sectional shape. The lower body 242 may be providedas a shape having the lower surface curved in a semi-circular shape, andhave the internal space partitioned into lower compartments 246 by lowerlattices 244. The lower lattices 244 may be formed in plural in thefirst direction (X) and the second direction (Y). The cylindrical body200 may have a plurality of air pockets formed in a lattice structuretherein by the upper compartments 226 and the lower compartments 246.Although 24 air pockets are formed inside the cylindrical body 200 inthe illustrated embodiment, the number, shape, and the like of the airpocket may be modified variously.

The upper structure 220 and the lower structure 240 may be manufacturedby a press injection molding product, respectively, and then fused andcoupled to each other. Both side surfaces 202, 204 of the cylindricalbody 200 with respect to the first direction (X) may have a convex shapeprotruded outwards from the cylindrical body 200. Both side surfaces202, 204 of the cylindrical body 200 may be designed to have thecurvature radius changed with the height. Both side surfaces 202, 204 ofthe cylindrical body 200 may be configured so that a lower area 206including a portion positioned below the water surface may have a firstarc shape having a first curvature radius (Arc1), and an upper area 208higher than the lower area 206 may have a second arc shape having asecond curvature radius (Arc3) smaller than the first curvature radius(Arc1) of the lower area 206.

An intermediate area 207 may be formed between the upper area 208 andthe lower area 206 of both side surfaces 202, 204 of the cylindricalbody 200. The curvature radius (Arc2) of the intermediate area 207 maybe larger than the second curvature radius (Arc3) of the upper area 208.The curvature radius (Arc2) of the intermediate area 207 may also be thesame as the first curvature radius (Arc1) of the lower area 206 and mayalso be larger or smaller than the first curvature radius (Arc1) of thelower area 206. According to an embodiment of the present disclosure,the upper area 208 of the cylindrical body 200 above the water surfacemay be designed to have a small curvature and the lower area 206 mainlybelow the water surface may contact the water more smoothly, therebystably maintaining the position and posture of the buoyancy body 120.

Hereinafter, the buoyancy body 120 optimally designed on the watersurface near the Saemangeum seawall will be described. The buoyancy body120 may have the height of about 600 to 700 mm (for example, about 665mm), the length of the coupling plate 228 may be designed to have about1000 to 1200 mm (for example, about 1100 mm) in the first direction (X),the length of the coupling plate 228 may be designed to have about 800to 1000 mm (for example, about 890 mm) in the second direction (Y), andthe thickness of the coupling plate 228 may be designed to have about 50mm. The width (diameter of the cylindrical body) of the buoyancy body120 in the second direction (Y) may be designed to have about 700 to 900mm (for example, 800 mm).

Both side surfaces of the cylindrical body 200 of the buoyancy body 120may be designed to be protruded about 100 to 200 mm (for example, about150 mm) with respect to the end portion of the coupling plate 228. Thethickness of the lattices inside the cylindrical body 200 may bedesigned to have about 4 to 5 mm (for example, about 4.5 mm). The heightof the lower area 206 having the first curvature radius (Arc1) may bedesigned to have ½ or more of the height of the buoyancy body 120. Theheights of the upper area 208 having the second curvature radius (Arc3)and the intermediate area 207 may be designed to have about ⅓ to ⅙ ofthe height of the buoyancy body 120, respectively.

FIG. 10 is a perspective diagram of a ball joint hinge apparatusconstituting the floating photovoltaic panel installation structureaccording to an embodiment of the present disclosure. FIG. 11 is apartial perspective diagram of the ball joint hinge apparatusconstituting the floating photovoltaic panel installation structureaccording to an embodiment of the present disclosure. FIG. 12 is aperspective diagram for explaining the connection between the ball jointhinge apparatus and a square tube constituting the floating photovoltaicpanel installation structure according to an embodiment of the presentdisclosure. FIGS. 13 and 14 are side diagrams for explaining anoperation of the ball joint hinge apparatus constituting the floatingphotovoltaic panel installation structure according to an embodiment ofthe present disclosure. FIG. 15 is a side diagram for explaining theconnection between the ball joint hinge apparatus and a square tubeconstituting the floating photovoltaic panel installation structureaccording to an embodiment of the present disclosure.

Referring to FIGS. 1, 2, and 10 to 15, in order to stably support thephotovoltaic panel during the occurrence of the movement due to waves,adjacent unit floating type structures 100, 100′ may be connected toeach other in a joint structure by the ball joint hinge apparatuses 180of an engineering plastic material connected to the end portions of thesquare tubes 142, 144. In an embodiment, the ball joint hinge apparatus180 may include a first joint member 182 coupled to any one of thesquare tubes 142, 144 in the adjacent unit floating type structures 100,100′, and a second joint member 184 coupled to the other square tube inthe adjacent unit floating type structures 100, 100′. Referring to FIGS.12 to 15, the first joint member 182 and the second joint member 184 maybe formed with one or more through holes (H1 to H8) to which the endportions of the square tubes 142, 144 may be coupled, may be used with abolt 185 and a nut 187 such as a split beam locknut, a modified threadednut, an inclined threaded nut, a nylok pellet, a lock collar, a frictionring nut, a nylon patch, a castle nut, a jam nut, and a saw toothsurface nut, in order to prevent the bolt from being loosened. The nut187 may also be formed in a shape of a wedge having an end portion 187 aopened.

The first joint member 182 may have a link coupling part 182 c having ahemispherical groove 182 b. A spherical ball member 184 a formed at thedistal end of the second joint member 184 may be accommodated in thegroove 182 b of the first joint member 182. The ball member 184 a may beaccommodated so as not to be separated from the groove 182 b by afastening part 182 a fastened to the link coupling part 182 c in a statethat is accommodated in the groove 182 b. In an embodiment, the balljoint link 180 may be provided as a connection part in a joint form of aplastic or engineering plastic material such as polyamide or Ultra HighMolecular Weight Polyethylene (UHMW-PE).

Meanwhile, the bodies of the first joint member 182 and the second jointmember 184 according to the present embodiment may be formed with acoupling groove to have the cross section formed in a rectangular shapeto correspond to the square tubes 142, 144 formed in a cross-sectionalsquare so that the square tubes 142, 144 may be coupled to each other.Further, the bodies of the first joint member 182 and the second jointmember 184 may be formed with the through holes (H1 to H8) through whichthe fastening member for fastening the square tubes 142, 144 to thebodies of the first joint member 182 and the second joint member 184penetrates.

According to an embodiment of the present disclosure, as illustrated inFIGS. 12 and 13, the angle between the first joint member 182 and thesecond joint member 184 of the ball joint links 180 may be freely andsmoothly, adjusted during the occurrence of the movement due to thewaves, such that as the angle between the unit floating type structures100, 100′ is flexibly adjusted, the stable support state of thephotovoltaic panel support structure 140 and the photovoltaic panel 160may be maintained.

FIG. 16 is a perspective diagram of a buoyancy body for the installationof a floating photovoltaic panel according to another embodiment of thepresent disclosure. Further, FIG. 17 is a side diagram of the buoyancybody for the installation of the floating photovoltaic panel in FIG. 16,and FIG. 18 is a front diagram of the buoyancy body for the installationof the floating photovoltaic panel in FIG. 16. Further, FIGS. 19 and 20are exploded perspective diagrams of the buoyancy body for theinstallation of the floating photovoltaic panel in FIG. 16.

The present embodiment differs only in the shape of the buoyancy body,and other configurations are the same as those of the buoyancy body ofFIGS. 1 to 16, such that the characteristic parts of the presentembodiment will be mainly described below.

Referring to FIGS. 16 to 20, the buoyancy body 120 includes acylindrical body 300 formed to be rounded, and the body 300 includes anupper structure 320 and a lower structure 340.

Both side surfaces 302 of the body 300 have a curvature radius changedwith the height, and both side surfaces 302 have a first lower area 305,a second lower area 306, a first upper area 307, and a second upper area308 formed in order from the lower side to the upper side.

The first lower area 305 is formed in an arc shape having a first lowercurvature radius (Arc11), and the second lower area 306 is formed in anarc shape having a second lower curvature radius (Arc12). Further, thefirst upper area 307 is formed in an arc shape having a first uppercurvature radius (Arc21), and the second upper area 308 is formed in anarc shape having a second upper curvature radius (Arc22).

At this time, the first lower area 305 and the second lower area 306 areformed as the lower structure 340, and the first upper area 307 and thesecond upper area 308 are formed as the upper structure 320.

The first lower curvature radius (Arc11) and the second upper curvatureradius (Arc22) are formed to be the same, and the second lower curvatureradius (Arc12) and the first upper curvature radius (Arc21) are formedto be the same. Further, the first lower curvature radius (Arc11) andthe second upper curvature radius (Arc22) are formed to be smaller thanthe second lower curvature radius (Arc12) and the first upper curvatureradius (Arc21). That is, the first lower area 305 positioned at thelowermost end side of both side surfaces 302, 304 of the body 300 andthe second upper area 308 positioned at the uppermost end side thereofmay be formed to be further rounded than the second lower area 306 andthe first upper area 307, which are positioned at the middle side ofboth side surfaces 302, 304. Further, according to the shape, the upperstructure 320 and the lower structure 340 may be formed to have a shapethat is symmetrical to each other. That is, it is possible tomanufacture the upper structure 320 and the lower structure 340 by usingone mold, thereby further enhancing the manufacturing efficiency.

Meanwhile, a pair of coupling plates 328 is disposed above the upperstructure 320. The pair of coupling plates 328 are spaced apart fromeach other in the first direction (X), and a spacing space 329 is formedbetween the coupling plates 328.

The coupling plate 328 is formed to lengthily extend in a directionperpendicular to the first direction (X), and coupling holes 328 a forstably fixing the photovoltaic panel support structure 140 arepenetrated and formed at both ends of the coupling plate 328.

Further, both end portions of the coupling plate 328 is spaced apartfrom the outer circumference surface of the body 300 by the curvature ofthe body 300, and fixing reinforced parts 327 for connecting the outercircumference surface of the body 300 and the coupling plate 328 so thatthe coupling plate 328 is fixed to the body 300 more firmly are formedbelow both end portions of the coupling plate 328.

In the present embodiment, the coupling plate 328 may be prepared inpair and the coupling plate 328 may be provided only at the couplingposition with the photovoltaic panel support structure 140, therebyreducing the overall weight of the buoyancy body 120.

Meanwhile, a plurality of upper compartments 326 partitioned by upperlattices 324 are formed inside the upper structure 320, and a pluralityof lower compartments 346 partitioned by lower lattices 344 are formedinside the lower structure 340.

The upper compartment 326 includes first upper compartments 326A andthird upper compartments 326C adjacent to both side surfaces 302, 304side of the body 300, and second upper compartments 326B disposedbetween the adjacent first upper compartments 326A and third uppercompartments 326C, that is, at the middle side of the upper compartment326. At this time, the first upper compartments 326A are positionedoutside the upper structure 320 and the third upper compartments 326Care positioned relatively inside the upper structure 320. Due to thecurvature shapes of both side surfaces 302, 304, the first uppercompartments 326A and the third upper compartments 326C may have onesides formed to be rounded, the volume of the third upper compartment326C is formed to be the largest, and the volume of the second uppercompartment 326B is formed to be the smallest.

Likewise, the lower compartments 346 partitioned by the lower lattices344 are formed inside the lower structure 340, and the lowercompartments 346 include first lower compartments 346A, second lowercompartments 346B, and third lower compartments 346C corresponding toand mutually contacting the first upper compartments 326A, the secondupper compartments 326B, and the third upper compartments 326C.

In the present embodiment, a first air pocket by the first compartments326A, 346A and a third air pocket by the third compartments 326C, 346Chaving a relatively large volume with respect to the first direction (X)may be disposed on both side surfaces of the body 300, and a second airpocket by the second compartments 326B, 346B may be disposed betweenthem, thereby providing more stable buoyancy. Further, the third airpocket by the third compartments 326C, 346C having a relatively largevolume with respect to the second direction (Y) may be disposed betweenthe first air pockets by the first compartments 326A, 346A having arelatively small volume, thereby providing buoyancy to the body 300 morestably.

FIGS. 21 and 22 are diagrams illustrating a portion of a floatingphotovoltaic panel installation structure according to still anotherembodiment of the present disclosure. Here, FIG. 21 is a side diagramillustrating an enlarged portion of the floating photovoltaic panelinstallation structure, and FIG. 22 is a perspective diagram of thefloating photovoltaic panel installation structure in FIG. 21.

The present embodiment differs only in some configurations of thephotovoltaic panel installation structure, and other configurations arethe same as those of the photovoltaic panel installation structure inFIGS. 1 to 16, such that the characteristic parts of the presentdisclosure will be mainly described below.

Referring to FIGS. 21 and 22, one side of the photovoltaic panel supportstructure 140 according to an embodiment of the present disclosureadjacent to the end portion of the photovoltaic panel supporter 146 isinstalled with a fixing frame 148 for fixing the photovoltaic panelsupporter 146 with respect to the second square tube 144. The endportion of the photovoltaic panel supporter 146 having one side mountedon the fixing frame 148 is positioned at a position spaced upwards by apredetermined spacing distance (d) apart from the second square tube144, and the photovoltaic panel 160 installed on the photovoltaic panelsupporter 146 is also positioned to be spaced upwards by the spacingdistance (d) apart from the second square tube 144.

According to the present embodiment, in the process of installing andoperating the floating photovoltaic panel installation structure on thewater, as the photovoltaic panel 160 is disposed to be spaced upwards bythe spacing distance (d) apart from the second square tube 144 formingthe support surface, an external force such as waves may be suppressedfrom being operated.

However, if the end portion of the photovoltaic panel 160 is disposed tobe spaced by the spacing distance (d) apart from the second square tube144, the support of the photovoltaic panel 160 to the photovoltaic panelinstallation structure 140 may become unstable.

Accordingly, the photovoltaic panel installation structure 140 accordingto the present embodiment further includes the triangular bracket 170for stably supporting the end portion 161 of the photovoltaic panel 160with respect to the second square tube 144.

The triangular bracket 170 may have the vertical directional crosssection formed in a substantially triangular shape, and the crosssection of the triangular bracket 170 may be, for example, a righttriangle.

The triangular bracket 170 includes, for example, a support bracket body171 made of a light, corrosion-resistant plastic material, such asPolyethylene or Waste Carbon Fiber Reinforced Plastics, and the supportbracket body 171 is formed with a first surface 172 forming the lowersurface rim of the support bracket body 171, a second surface 173forming the front side rim of the support bracket body 171 andsupporting the photovoltaic panel supporter 146 and the end portion ofthe photovoltaic panel 160, and a third surface 174 forming the rearside rim of the support bracket body 171.

The first surface 172 has the largest area, the third surface 174 hasthe smallest area, and the area of the second surface 173 is formed tobe larger than the area of the first surface 172 and smaller than thearea of the third surface 174. That is, the first surface 172 having thelargest area contacts the second square tube 144 so that the triangularbracket 170 may be supported with respect to the second square tube 144more stably.

A portion of the second surface 173 is a recess 177 recessed by apredetermined depth and having the photovoltaic panel supporter 146 andthe end portion of the photovoltaic panel 160 seated thereon, and oneend of the recess 177 is formed with a first stopper 176 and a secondstopper 178 in which the end portion 161 of the photovoltaic panel 160and the photovoltaic panel supporter 146 are locked, respectively andtheir seated positions are maintained.

Further, fastening holes (not illustrated) may be formed in the recess177, and a fastening member penetrating the photovoltaic panel supporter146 and the photovoltaic panel 160 may be fixed to the fastening holes,thereby supporting the photovoltaic panel 160 more stably.

Further, the end portion 161 of the photovoltaic panel 160 and the endportion of the photovoltaic panel supporter 146 may be locked to thefirst stopper 176 and the second stopper 178 formed at one side of therecess 177, thereby supporting the photovoltaic panel 160 more firmly.In the present embodiment, the end portion 161 of the photovoltaic panel160 is formed to extend longer than the end portion of the photovoltaicpanel supporter 146, and the end portion 161 of the photovoltaic panel160 and a portion of the lower surface of the photovoltaic panel 160 areseated and supported on the triangular bracket 170.

At this time, the recessed depth of the recess 177 is formed to belarger than the sum of the thickness of the photovoltaic panel supporter146 and the thickness of the photovoltaic panel 160, and formed to besmaller than twice the sum of the thickness of the photovoltaic panelsupporter 146 and the thickness of the photovoltaic panel 160.

Further, the side surface of the triangular bracket body 171 is formedwith a triangular bracket side through hole 175 in a direction parallelto the plane in which the first surface 172, the second surface 173, andthe third surface 174 are formed, that is, at the side of the triangularbracket body 171. The triangular bracket side through hole 175 may beformed to have a shape corresponding to the triangular bracket body 171,and formed to have a shape reduced at a predetermined ratio with respectto the shape of the triangular bracket body 171.

The triangular bracket side through hole 175 is formed to have a reducedshape with respect to the shape of the triangular bracket body 171 toconstantly form the thickness of the triangular bracket body 171 onwhich the first surface 172, the second surface 173, and the thirdsurface 174 are positioned, thereby properly distributing the loadapplied to the triangular bracket 170.

Further, as a portion of the triangular bracket 170 is penetrated andformed, the weight may be reduced, and when an external force due towaves or wind is applied to the side surface side of the triangularbracket 170, the side surface of the triangular bracket 170 may notresist the external force, and the external force may pass thetriangular bracket side through hole 175, thereby increasing thestability against the external force.

Although the preferred embodiments of the present disclosure have beendescribed above, the present disclosure is not limited thereto, and maybe modified variously within the scope of the claims, the detaileddescription of the disclosure, and the accompanying drawings and it isnatural that this also belongs to the scope of the present disclosure.

What is claimed is:
 1. A floating photovoltaic panel installationstructure comprising at least one unit floating type structure forsupporting a photovoltaic panel on the water, wherein the unit floatingtype structure comprises: a plurality of buoyancy bodies arranged to bespaced apart from each other; a photovoltaic panel support structuresupported on the plurality of buoyancy bodies; a triangular bracket forsupporting the photovoltaic panel support structure supported on theplurality of buoyancy bodies; a ball joint hinge apparatus forconnecting one of the plurality of buoyancy bodies to another; and atleast one photovoltaic panel supported by the photovoltaic panel supportstructure, wherein at least one buoyancy body among the plurality ofbuoyancy bodies is made of a material in which Polyethylene and WasteCarbon Fiber Reinforced Plastics have been blended, wherein the at leastone buoyancy body among the plurality of buoyancy bodies comprises acylindrical body, and wherein the photovoltaic panel installationstructure further comprises a panel supporter supported on square tubesto support the photovoltaic panel and disposed to be inclined on thesquare tubes, and a support bracket disposed between any one square tubeamong the square tubes and an end portion of the panel supporter tosupport the end portion of the panel supporter in a state that is spacedby a certain distance apart from the square tube, wherein the supportbracket comprises a support bracket body having a vertical directionalcross section formed in a triangular shape, wherein the support bracketbody is formed with a first surface forming a lower surface rim of thesupport bracket body, a second surface forming a front side rim of thesupport bracket body and supporting the photovoltaic panel supporter andthe end portion of the photovoltaic panel, and a third surface forming arear side rim of the support bracket body, wherein an area of the firstsurface is formed to be larger than an area of the second surface, andan area of the second surface is formed to be larger than an area of thethird surface.
 2. The floating photovoltaic panel installation structureof claim 1, wherein the Waste Carbon Fiber Reinforced Plastics comprisesa waste generated in a process of manufacturing Carbon Fiber ReinforcedPlastics.
 3. The floating photovoltaic panel installation structure ofclaim 1, wherein the at least one buoyancy body comprises 20 to 80 wt %of the Polyethylene, 20 to 80 wt % of the Waste Carbon Fiber ReinforcedPlastics, and 3 wt % or more of an ultraviolet shielding agent.
 4. Thefloating photovoltaic panel installation structure of claim 1, whereinthe at least one buoyancy body comprises a High Density Polyethylenehaving the density of 930 to 970 kg/m3, a Low Density Polyethylenehaving the density of 915 to 925 kg/m3, a Linear Low DensityPolyethylene, and the Waste Carbon Fiber Reinforced Plastics, andprovides buoyancy of 10 times or more relative to the weight of thebuoyancy body.
 5. The floating photovoltaic panel installation structureof claim 1, wherein the cylindrical body has an upper structure and alower structure fused to be coupled with each other and extending alonga first direction, wherein the upper structure comprises: an upper bodyhaving a semi-cylindrical shape a top of which is truncated, and havingan internal space partitioned into upper compartments having a latticestructure by upper lattices; and a coupling plate formed integrallyabove the upper body, and for coupling with the photovoltaic panelsupport structure, wherein the lower structure comprises a lower bodyhaving a semi-cylindrical shape with the lower surface curved and havingthe internal space partitioned into lower compartments to have thelattice structure by lower lattices, and wherein the cylindrical body isformed with a plurality of air pockets having a lattice structure in theinternal space by the upper compartments and the lower compartments. 6.The floating photovoltaic panel installation structure of claim 5,wherein the square tubes are made of a corrosion-resistant metalmaterial disposed on the plurality of buoyancy bodies and the triangularbracket, wherein the coupling plate is extended to be protruded fromboth side edges of the upper surface of the upper body toward theoutside, and the upper surface of the coupling plate is formed to have aflat surface, and wherein coupling holes for coupling at least onesquare tube among the square tubes are penetrated and formed on the edgeportion of the coupling plate expanding from the upper body to theoutside.
 7. The floating photovoltaic panel installation structure ofclaim 6, wherein the at least one square tube among the square tubes andthe triangular bracket are made of a material in which the Polyethyleneand the Waste Carbon Fiber Reinforced Plastics have been blended.
 8. Thefloating photovoltaic panel installation structure of claim 6,comprising the unit floating type structure in plural, wherein in orderto stably support the photovoltaic panel against movement of waves,adjacent unit floating type structures are connected in a jointstructure by the ball joint hinge apparatus of a plastic materialconnected to the end portions of the square tubes.
 9. The floatingphotovoltaic panel installation structure of claim 5, wherein both sidesurfaces of the cylindrical body with respect to the first directionhave a convex shape protruded from the cylindrical body to the outside,and the both side surfaces of the cylindrical body have a curvatureradius changed with a height, and wherein a lower area comprising aportion positioned below a water surface of the both side surfaces ofthe cylindrical body has a first arc shape having a first curvatureradius, and an upper area higher than the lower area of the both sidesurfaces has a second arc shape having a second curvature radius smallerthan the first curvature radius.
 10. The floating photovoltaic panelinstallation structure of claim 5, wherein both side surfaces of thecylindrical body with respect to the first direction have a convex shapeprotruded from the cylindrical body to the outside, and the both sidesurfaces of the cylindrical body have a curvature radius changed with aheight, wherein the both side surfaces of the cylindrical body have afirst lower area, a second lower area, a first upper area, and a secondupper area in order disposed thereon from the lowermost end of thecylindrical body to an uppermost end thereof, wherein the curvatureradiuses of the first lower area and the second upper area are formed tobe smaller than the curvature radiuses of the second lower area and thefirst upper area, wherein the curvature radius of the first lower areaand the curvature radius of the second upper area are the same as eachother, and wherein the curvature radius of the second lower area and thecurvature radius of the first upper area are the same as each other. 11.The floating photovoltaic panel installation structure of claim 5,wherein the air pocket of the cylindrical body comprises a first airpocket, a second air pocket, and a third air pocket formed to havedifferent volumes from each other, and wherein an air pocket having alargest volume and air pockets having a next largest volume among thefirst air pocket, the second air pocket, and the third air pocket aredisposed on both side surfaces of the cylindrical body with respect tothe first direction, and air pockets having the smallest volume aredisposed at a middle side of the cylindrical body.
 12. The floatingphotovoltaic panel installation structure of claim 1, wherein the secondsurface is formed with a recess recessed by a predetermined depth andhaving the photovoltaic panel supporter and the end portion of thephotovoltaic panel seated thereon, and one end of the recess is formedwith a stopper in which the photovoltaic panel supporter and the endportion of the photovoltaic panel are locked and their seated positionsare maintained.